Rhizome rather short-creeping, c. 3-4 mm ø; scales fuscous, elongate-triangular, long-acuminate, to 3 mm long, to c. 8-seriate at base, the uniseriate apex rather short. Leaves close; petioles dark stramineous to castaneous, dull, abaxially (mostly obtusely) bi-angular, upward usually pale-edged, c. 10-45 cm long, 2/3-1.5 times the length of the lamina. Lamina simply pinnate, oblong, with c. 10-18 free pinnae to a side and a pinnatifid, basally hastate leaf-apex; rachis stramineous to dark, abaxially narrowed-rounded or sometimes carinate, at the base often shortly bi-angular. Pinnae coriaceous, dark olivaceous above when dry, ascending, linear, subacute to acuminate, c. 10-20 cm long, 4-6 mm wide, unequally cuneate at the base, the margin serrate; teeth ascending, 0.5-1 mm long, acute when sterile, ± obtuse if soriferous, the basal acroscopic tooth often larger and slightly auricle-like. Costa stout, percurrent, mostly pale, abaxially strongly elevated, rounded to subacute; veins abaxially ± prominulous, close, very oblique, once forked, the anterior branches running to the marginal teeth, or when fertile often both branches bearing a sorus on their connivent ends. Upper pinnae rather suddenly reduced. Sori placed in the teeth, uni-or occasionally binerval; indusium darkish, entire, 0.5-1 mm long, 0.5 mm wide, almost reaching the margin. Spores light brown, ellipsoidal, smooth, c. 36 by 28 μ.
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